is a large species of deep sea colonial hydrozoan of the family Prayidae. Found in extremely deep South Atlantic waters. Their name of giant holds up as the are one of the largest invertebrates alive to day growing up to 160 ft long! (rivaled only by the bootlace worm at 180ft). This animal has a long string of small circle-like bells which make up most of the body, these are the stinging cells that are a trademark of cnidarians, a sting from P.dubia will cause paralysis or death. At the front? of the animal is a dome like bell which houses the animals nectosome (swimming bells). they like their Man o war relatives are hunters and use a blue bioluminescence to attract prey which it then kills with its stinging cells. Don’t expect to see one of these animals anywhere other than 2-3000 ft down as their hydrostatic skeleton will burst if brought to the surface.